docs: def import_data(self, file_name='*', folder_name='.', head_row=0, index_col=0,
                      convert_col=True, concat_files=False, save_file=True):
          """ Imports csv file(s) and stores the result in self.imported_data.
              
          Note
          ----
          1. If folder exists out of current directory, folder_name should contain correct regex
          2. Assuming there's no file called "\*.csv"
  
          Parameters
          ----------
          file_name       : str
              CSV file to be imported. Defaults to '\*' - all csv files in the folder.
          folder_name     : str
              Folder where file resides. Defaults to '.' - current directory.
          head_row        : int
              Skips all rows from 0 to head_row-1
          index_col       : int
              Skips all columns from 0 to index_col-1
          convert_col     : bool
              Convert columns to numeric type
          concat_files    : bool
              Appends data from files to result dataframe
          save_file       : bool
              Specifies whether to save file or not. Defaults to True.
  
          Returns
          -------
          pd.DataFrame()
              Dataframe containing imported data.
  
          """
          
          # Create instance and import the data
          import_data_obj = Import_Data()
          import_data_obj.import_csv(file_name=file_name, folder_name=folder_name, 
                                  head_row=head_row, index_col=index_col, 
                                  convert_col=convert_col, concat_files=concat_files)
          
          # Store imported data in wrapper class
          self.imported_data = import_data_obj.data
  
          # Logging
          self.result['Import'] = {
              'File Name': file_name,
              'Folder Name': folder_name,
              'Head Row': head_row,
              'Index Col': index_col,
              'Convert Col': convert_col,
              'Concat Files': concat_files,
              'Save File': save_file
          }
          
          if save_file:
              f = self.results_folder_name + '/imported_data-' + str(self.get_global_count()) + '.csv'
              self.imported_data.to_csv(f)
              self.result['Import']['Saved File'] = f
          else:
              self.result['Import']['Saved File'] = ''
  
          return self.imported_data